Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3c2a4136235b1953529b2ad0bd7bcba78f843cb7c048b124643f4916dd270d7' 
  AND token = 'fmq7qyNYp6dj2KYXMmvf36VI0NQsC2f6cHyw00iivMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}