Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9911d1d91b64ce81ee83a718c03529cca36455205e5c1b66b1c4e7760f2bfa01' 
  AND token = 'la9awGA4XZmx6AOVqNIuE4dS98G4s1gay5eUJ97ezGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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