Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64713c2a5dd20d3be97f3815340a14e545c72e92349a8da6b45ff0f34e4a6899' 
  AND token = 'u+S5XNwxc/vMIpkXvkPojQfkU1ARA6K7CO0mR/kK7sk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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