Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34ec9857be65437c77cab51e644db458c779a06423f14acf8e7ea5dd42a5b418' 
  AND token = 'rbUr4SjqkuuSbJ00zbHnUJFNtJ+E50OZqBkU/a7ORH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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