SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de905c0d4c4da84064b27faa7572dbc0174e93c9cc5f0f7592efb6852166e195' 
  AND token = '+nrcu+svgH2Pq5+U8r7bXC/tgcX97FBVdz8uRzfjUws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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