Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd669ca3e454e9296e34e1236c56f8ba97530f50e65064a001ea5e1f5dcefcfe' 
  AND token = 'lZJormsIoJMnk99tqWlS9b2iSNgtLUOH4DozdfMRwSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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