Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '437bbdf7f38b40d1ccd4585d0314b3af5e64f79ea81773b26ab5771c5bac59b1' 
  AND token = 'txQM8B2eSzkOtomXT5ZQJknFnWANozeLV8KWp6HL5d4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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