Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65813a0b221ad0687d02d1fdb60bcd401dce3c1655dc330dbab310d72465cd40' 
  AND token = 'EZJWCpuVSJ6aPX5C2vzu3oo1z36kQZbD4vp7BmgDHPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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