Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '786a4a09b4736ea140297a94ffd692669c0d430f6de2ee52ffd943a2c7f5fe9b' 
  AND token = 'G6dczYLnWM4o5UASgvlaeragubsaXqTyT1mLHFPR+oM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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