Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e8e7f76aa260315568d798f0cf8a18f6333448cb2d1a3da97cf2bf604c0bf79' 
  AND token = '+Kw2b5ItoNhOlQMHp3CW+y/m+oxZ5trk6V/XRf3w38E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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