SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '466ae3cab0f7654c3570916f5c1d18807480c49b2f2f5eb8bd37df379367f5c5' 
  AND token = 'yCcL0B8BPoJw0jZIDOG3aFEltVNnd3uIXcsyU7EhlVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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