Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0d6a7ad45b769dd692edee3a6fbc169d0783a522a7f88812780c79ee4a14dc5' 
  AND token = '/kKdBs+SgN8WKTC39YYz2qaaAdW7NyY9YEiltUtnsrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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