Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3682a0d493bf407692f84db1a537c0c0abf6adc4e843a919b7278f3fdcb4a250' 
  AND token = 'gOD+cTCy9YLmGZL08w0d4IUfMqGzUrxDW3pAzu8M7sM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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