Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb178e461d3c666da28fc6cf8f95f157d08e5f15fe993fbe4f16230e6f150935' 
  AND token = 'dUGFqYWp81ci8/V6C816lTdI2QaFgCusZLQPkG/RfdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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