Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df91fe779515e44001de6896c877330cb80b0789649cca1cbcc8b1664bbf9763' 
  AND token = 'GHV4w01g+w/m7Nj/AuRCKgUjOAkw8sNMLF7Vo+AZ9/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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