Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fac52bf3536a53f13b86d568f96092990e48cd2feac928a21da3074ccc4239f5' 
  AND token = 'TRzB4dYbGH+MekowI3LX2VlxqkQtp4L/xfrh4/QyBT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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