Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13b3194bd8063b18664bb611da844e0ce98479a14eafaa4bcb2d666ac1efa8e8' 
  AND token = 'vDT1mmGQJ7wqgrvJthrTnG1xLmBtzv0XcoImojLhQmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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