Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5ca4d25b0554d45ad692041d4598ee1b72a3811203be968b5bd1dd043aaa867' 
  AND token = 'MNuXdlWuu1Nm6dUv4atHTeVewnIAs6RFOZTPKNPwP8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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