Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '911b6f5d00de4d0176d31309e3fda4d3d0a5671ce0e4b70860862e805c8e73bf' 
  AND token = 'FKR1cWezhk4lTWB59j6e798g5A4gATiAAdcXEVZYUQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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