Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fedbc36aafc138654255051582a8c15178c69b0464cabe4c16c7c7a8d0ba8523' 
  AND token = 'W557MergppWSisN6Y+hlOcSDCTAD4S6hxX8kZFqfb8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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