Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a015a77289304f080b07ec2e3a9bfc70f5d8e4e327a27ea8eb5923c4dc2fed61' 
  AND token = 'AU7zgB8PKEpCAqZ6tFyCodhK51XePebjMYd5c+o7OIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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