Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbb5a764e0d32a8afc21a45d2e2825982567be4e97fc661414b1aea3bfc9c4eb' 
  AND token = '3HyqrDP3eO3GsVgTB//ECWuN+j2bsykTb5cah+8I3YM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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