Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45bd09f274480363b8d2640409a80fe66559a345d38775908e4d877ebb0039e3' 
  AND token = 'Gp3FInxNp14jmGmmXS130q3COtAK/vQ3jcuBbgi2Lc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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