Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fadc0b7cdff28d965b3924d7afff1ee647209e130efcfbeb9e72b72400497ce' 
  AND token = 'zXirAZRhqHEKTSBUcLCQaL+1w8xPB70DnZzUKsEcfVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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