Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10d3f4e785b7a4f1bcd53d68b3e66c8865d936434bdc62292be0de7c6a16cd5f' 
  AND token = 'yRazuEphl7apbE9Cyh99kdTfHnLUxPKi1PQSVmX9zwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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