Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a371f18bf761a86a80a5ef22f59bac2f54e200194b33910a9a206bc7dc967367' 
  AND token = '5JUHD665UEJfWdVeuTxVBmZAaxowIKiL+cbkfoVw7dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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