Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5218ba882e24a04de0301ab58a7a285c8e81c6a2b6133d611280bb1d07adc6c0' 
  AND token = 'sa4eZFk3hR8cjilnF064VFTAycg5GwQ92gKPa5EDOL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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