Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00b59dc11caf66c501d6ba9ae166407cf000fe9cbb30bf23f60dc0fead1b4e41' 
  AND token = 'e/EGxxl1ZQ/CkfCtXJC/EW44bwOvFWtKyUoiF6l21mE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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