Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f4b0d4593831cdbf1b350690ef81748a70104acff611d92a72a8e839a2fa6203' 
  AND token = 's8+/w4ii+6DJagSKIslTi7iTEZovc/l9ITD4d32XhfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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