Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '286ed755bd821212039027e1a1257f9032b6477b665568f4ba231f13ae5e999f' 
  AND token = 'rcsIUcNsgkrlo6gohsIz96h2AkSCoAcsbnbIUmg2qN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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