Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1b3576c2f07903d2d9e9d756a036c1ac93c770d43a6486d1c85ebc44ccafbed' 
  AND token = '5U/3S4vGlmuLmIN/+DGoSt17S+pr8zBWimX0qY9mfnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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