SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'db968d93454210d0c595667254122be33629b7358e9a397f3d3f4807ef79a3f0' 
  AND token = 'KxZg1fyJum5AQCFDufmVikGiWj8Hwkf1NaNsTGEX9s0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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