Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b71e7ec7812730c9c6d7653aa0e65b9f20275972cad63ff250d732ebaa99ee8d' 
  AND token = 'p2kGrxP1q53PgDMbwesiKDeU1/MO3wSfYYIKKkN/wmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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