Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e96684bfbc847674fec3fed46b63863fdc8ca23fe9558dfaadfa272217a14fe0' 
  AND token = 'mp5WUJggFyR3TDtENxJ8tKyBLfIQ5j4dfE265Bh5vlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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