Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04e919390e45e29206cb6cea7058738b2c0eade27602347118fd7db1611d76fa' 
  AND token = 'yJK1u/8o4WcAI+fpqCK7HRTsVGkrXmmK78Cthcd8V+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}