Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0249c8e4d79f73901b9fbfb3d96774b6b7ca3a8c51f65578031e6c4af05367b4' 
  AND token = 'f4hIxFrp7rZbVEr9cMCtnM/fZPMX7qKsRWbGlKUXnKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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