Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42675f14092deebe113097b5eaa4188ca4765c6ca18f920d8a876fb9b1b32b63' 
  AND token = 'CRRvN1TapOHSl+NNLTMaBBk3WBnNMeNhvL4mhKneR5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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