Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b19f12fa3a3f8bb1a15304fab78fc1b0c44ef112a322d800d769046bbc06c31' 
  AND token = 'CYxMAcWAkuPdonz5APfksel/8SKVWHY/xPg+GmOpsa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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