Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0087f9c07d1680e24751e9cc8d6c3cc719f0162facee8e8f5346bcebf2d3d5e9' 
  AND token = 'ix8AWaRHn29ugRcljOCnVjgDzwTSxq+wtTp4WOPFmGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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