Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0608e2c14cb27c8521ed83a53d6ea5f15a241d4850e3055a0a7236ed1811ed3e' 
  AND token = 'R7v+XhrTf4dL3f3YUTxRgRFfK7RhAgFC7hznDXPWhpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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