Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '435958c9018098b2092aac748fd0a05dd62e50573c89075e6c3847bb89eeb490' 
  AND token = '7bYL8cFJSu0no/Taw3KueLC7sRImyczkksjgtBFjlNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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