Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da711da1c74505e35521aca3e1e4830b60e3c22a2c1e5eb8e90cb0667f6fc4db' 
  AND token = 'i2VTG7oNMdC25ANrFS1OJV52jcQmJXttgP9CZMqgcRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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