Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '684456a4ebdf16d9da0a18e681d73430fd036523669a2fe083d88c5be8cfea17' 
  AND token = 'Wbc0U/DleK61rI8tLdTkCVTpfp8Taj1mR1NQ9lWGd5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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