Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34bd1a3622d4521c03179a5527fb45de80f71e6e2dd485ae1b1064a5ae537128' 
  AND token = 'IoJSbKmhwxAoLgyHPcHFwzrM+OBb04puAZ2P+LLcndo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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