Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6116463fcbcd507ca83ad998c272e03de6b1afeb5935d4e6a03f664713f20886' 
  AND token = 'OHo/vAxNY2I/pbDa93QPEyyFEevy1rXPhUbAaBQXOns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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