Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c285648473f9be3d8584e56f145840358691d444311cf68bd4b68e6b36a9c40c' 
  AND token = 'gIlDSY74b2B1YHh28AY/GoHOhMnKAvHIYT03tU3tKUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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