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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '496236f50542ecd2f06f9475e5cb472b2fceae82c9931605276ebe417217af77' 
  AND token = 'Dw7sXq/OqyLrYolb7Qg7n/O3xwjIpl9lztTk7HdXeAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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