Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f33954909765eee5a668cd138a79390e4b76f3a7ccbf047d62d43313d9453b91' 
  AND token = 'gQgLNixnqd8L6CE+zEghF1I1iFeP8lQOss18YMUYIus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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