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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd9595e112edb0f1ac94308b4909b88323789ebf5ea8c2682840cb445216e94f6' 
  AND token = 'j6RHPTlUfeSlsOpHlHcl3arO0eba8jNMSsc7XEuT6r8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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