Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82f8604f3412ab4fda3bdf8863c2789dfe13fd1dd1611683f5338d24ddabc260' 
  AND token = 'cJs18u11V4tM0s4DzPAmhx7VTyLsdNr6pPEGn7N/9vs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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