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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeb5b56d1eb6f393a0d97acc50e4ad64cbdffc159cd2a41a79b7f0dafc73feed' 
  AND token = 'j7hTAo1Q2SGeIef1jee0GwGlhN1gS8mZiGnzTAUZ+1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}