Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'beba0b5d58971b2c131e41eb937392c8fcb86c8f329272f543c0d9552bf301c6' 
  AND token = 'rp7w8O+OWI1ngcwWOcJueR532zR/WFbFsXSgD4sBvko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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