Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fc2b711aa4a9eb0765dc45eb72123d18848590144ca508eecd5ed33dd15a9ef' 
  AND token = '5WjZAOgw+8C4h+ZlYc95pJMNWMmpKFro9f5f+kH2RmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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