Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '249a4f27bc3983f01c81cd34450dbfe2cefd1837ed904db676d6be0fac6a529d' 
  AND token = '8yaOeSI/xc3/xEuraFOaknh+I5u6HbjEVN30ZN3IiKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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