Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9b98819cac0ae043e22d3582c26234b1ac2f4187b4ba7260765edf39865ca72' 
  AND token = 'mQTHSSF06QcNEsII28e2PkXh8uJDw9ikUgeqAZZtcIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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