Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65ff8682f7c820c798a34e143eef5f774cf6dc499be321c43eaa90fccbca3627' 
  AND token = 'olncDGnUeK4x3r/h0Al1ENC7rmpPY8n1kFEjjPfCsB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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