Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5b47c21a0ca55778c4138cb66d8c4456cfa9ba009f5635b7fc885f109ae757c' 
  AND token = 'Pf2OwPBMCU0H+ULUTWII4aMi1occhhjS2yAgmgZmWVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}