Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f5fbfe88e8f3e54b099fb4f9103825b0e4fd161c41c79c9729d13fead21744c' 
  AND token = 'M/7UrdrDtC4pai4kqeOYGxCJHnQRAcJqzsvsyVLiwoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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