Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3403bb9bee4dc8c52c9d93d470f77802840262c7294431c94de351b89aeef0a0' 
  AND token = '1JgBf8nOrm7x+0EmjizX3NYcDb1lQiU80E7laaXRf/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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