Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9576b180f35d40f8c8d5c6ca7e5a30ef9d18de858fcaa56b00e3df80da6f6a9' 
  AND token = 'kvuCrfEWSHQzdXGce9V1aGDW2zKsOnYvJJNZk8uRdIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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