SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9413f1ab04b4fc8ee3f260d667494a08255654dbcd2829d4d95f0807a4945262' 
  AND token = 'vlpqw9iCnlbh/z/LF8GQlzmjyWFgOF22EOGX6CcJZBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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