Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0258d5509831b7d0b23e4654e8b37ac4a024414df4fc040a0fd683dc302501dc' 
  AND token = 'KsmEGHlCnO2ekl13/LhCma2a/9I9zp9ajnmdFbjQAPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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