Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ab18ce62a1e8afeceb6158796be0bd16398a236cc0bcf9efb21a06560142565' 
  AND token = 'FD53cqLSNpDd8MFy9HXfA7HspBwgA079H5XhzJ9sOio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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