Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4edfa7c21876db740c9fa71ff5e560db97f435e6815c9b3e43ed5239d290ddfa' 
  AND token = 'F+WT/DT9ocezWk+rSOvZJ9USI6ahBmR8TpWGNfRnB/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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