Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c87115397dfd342fc4ce1bc5e6b3519899adf9f261c0c0d1872baa7fb58b5091' 
  AND token = 'SU0VWwHngV9JNI2jDKQdDypye2Qxt1GpOxMbkYaWgNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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