Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cfdaf8604efd56c2edd4393faf22b132729327550a92813837864601ab562c2' 
  AND token = 'bzz1PDm3kvQoxg5KWV4NLF7p42XkmNDx2H1+MkrBoJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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