SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8a95c0df3b77edca98b46b19c490e240932385171695f9cdbc6805231475c4e' 
  AND token = 'Wnr/KzFeUPnbOrXDvo/3GgbT2VUNH/0IXD6ORgyGtQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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