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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01aba84a9a450309f29989e544d536be9649c9409fe672e3168f82e6654f2925' 
  AND token = 'd3Ya1xp2ZH/VZHTEWtC1iLRMBURp3RNinf+WduYMlQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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