Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf1c700c3a4e36fadb8f8e3c5bd3964356a13d7c6b0bfe9b80b91c1bb4181eb8' 
  AND token = '3/bMbUvpH5TtMrdfJ9veJjrtUc8sjSGGg9BoKNV0ASs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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