Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de791d2c05f6e5771a30bd65ab81b01a0c3821bd420ba57127c39656f08b7b39' 
  AND token = 'EUmvq25ypw+yRRKsaAGbeVCH6dQ9yU3PKC9wuu/lsq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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