Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8367133ba3afce27dd62e2db535b1bef6bfaeff320935f3eee58e09d570a0af3' 
  AND token = 'AYVfhRdtjYPu2I0PQHa2RC2bGfVoKvjxB4CJHXsFMm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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