Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01b91b4e623b1776d39595080085eb949574889a810a9aae242920fbd4954900' 
  AND token = 'IsDDsr318NMJ7Ker1lwCw+4DUTp1kOsDhcH/pz7Ps1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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