Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b762cfe98c3c4224e5a74befa322ea53e4292df79a2d9206ce792b35ff3a48c5' 
  AND token = 'r2LB9jeANJlp4toOie6DXABLuS41xzvzkPBaDUzTEl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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