Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cafa1164a167ce701853d95cbf54955ec7979ef25e0f819dabcfcfe2ccc69bde' 
  AND token = 'MWggY+F8qxr2zyj73Ou0PmpvkG3Ux1UqiAVOgNEvVoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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