Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '219c8512af3178cea67f6f89c073438039bac3e80cc40cc20ecb5157e7fdba1c' 
  AND token = 'bnpzU2z/png21oAls/iIAuU+BwMzkEN5FPrAlkJQHOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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