Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c3383589410ed98d0ce7ae64abce230de9d9cfd65f74150fe0093bd8023aa1a' 
  AND token = 'fD+FNnkJMSmLX8OPKRB+6s21KKlBIhmWpefnlGcHqr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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